68528121543856 has 40 divisors (see below), whose sum is σ = 151397535500064. Its totient is φ = 29767871800320.

The previous prime is 68528121543787. The next prime is 68528121543919. The reversal of 68528121543856 is 65834512182586.

It is a super-2 number, since 2×68528121543856² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9690058900 + ... + 9690065971.

Almost surely, 2^{68528121543856} is an apocalyptic number.

It is an amenable number.

68528121543856 is an abundant number, since it is smaller than the sum of its proper divisors (82869413956208).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68528121543856 is a wasteful number, since it uses less digits than its factorization.

68528121543856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19380124909 (or 19380124903 counting only the distinct ones).

The product of its digits is 110592000, while the sum is 64.

The spelling of 68528121543856 in words is "sixty-eight trillion, five hundred twenty-eight billion, one hundred twenty-one million, five hundred forty-three thousand, eight hundred fifty-six".